G21D 3/12
By adjustment of the reactor in response only to changes in engine
Official title: by adjustment of the reactor in response only to changes in engine demand
G21D3/12 (By adjustment of the reactor in response only to changes in engine) appears on 60 US grants and 43 published applications in this corpus.
Search patents in G21D- Granted patents
- 60
- Published applications
- 43
- Assignees
- 34
- Inventors
- 143
- Latest grant
- 27 Jan 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 3 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 3 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 2 | 0 |
| 1988 | 2 | 0 |
| 1989 | 2 | 0 |
| 1990 | 3 | 0 |
| 1991 | 1 | 0 |
| 1992 | 3 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 2 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 1 | 1 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 1 | 0 |
| 2005 | 1 | 2 |
| 2006 | 1 | 2 |
| 2007 | 0 | 1 |
| 2008 | 0 | 2 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 1 | 3 |
| 2013 | 2 | 0 |
| 2014 | 3 | 1 |
| 2015 | 0 | 0 |
| 2016 | 0 | 5 |
| 2017 | 0 | 2 |
| 2018 | 3 | 0 |
| 2019 | 1 | 4 |
| 2020 | 0 | 4 |
| 2021 | 3 | 4 |
| 2022 | 4 | 2 |
| 2023 | 1 | 1 |
| 2024 | 3 | 5 |
| 2025 | 2 | 0 |
| 2026 | 1 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Passive chemical injection system for controlling a nuclear reaction by delivering a neutron-absorbing chemical into a containment vessel27 Jan 2026US 12,537,110 B2NuScale Power, LLC
- Energy storage system for nuclear reactor remote installation18 Feb 2025US 12,230,410 B2Westinghouse Electric Corp.
- Using xenon concentration in controlling a nuclear power plant7 Jan 2025US 12,191,044 B2Framatome
- Controlling a power output of a nuclear reaction using chemical injection24 Sep 2024US 12,100,523 B2NuScale Power, LLC
- Controlling a power output of a nuclear reactor without using control rods28 May 2024US 11,996,208 B2NuScale Power, LLC
- Nuclear Power Plant, Control Device for Nuclear Power Plant, and Control Method for Nuclear Power Plant20 Aug 2026US 2026/0245756 A1Hitachi GE Vernova Nuclear Energy, Ltd.
- Nuclear Power Plant and Power Generation Method in Nuclear Power Plant2 Jul 2026US 2026/0188535 A1Hitachi-GE Nuclear Energy, Ltd.
- Hybrid power generation system30 Apr 2026US 2026/0121573 A1Holtec International
- Approach temperature steam generator control16 Apr 2026US 2026/0104163 A1NuScale Power, LLC
- Controlling a power output of a nuclear reaction using chemical injection5 Dec 2024US 2024/0404716 A1NuScale Power, LLC
Most cited
By later US patents
- Fast reactor having reflector control system33US 5,420,897 ACentral Research Institute of Electric Power Industry · 1995
- Nuclear power plant19US 4,879,087 AHitachi, Ltd. · 1989
- Control system for a nuclear steam power plant19US 4,975,238 AMPR Corporation · 1990
- Method for operating a nuclear reactor to accommodate load follow while maintaining a substantially constant axial power distribution18US 4,222,822 AWestinghouse Electric Corp. · 1980
- Controlling the response of a pressurized water reactor to rapid fluctuations in load18US 4,707,324 AWestinghouse Electric Corp. · 1987